Air-pump.



MII@ IIV .1 11111 Patented June 11,1912.

fllllllld 1I!! AIB. PUMP.

APPLIOATION FILED 00T. 24. 1911.

P. J. SGHABPBR 1B. BBYER.

Preda-1ER En?? l MalQ/ZMUA Ano/mns invention FREDERICK J'. SCHAEFER AND EMIL B EYER, OF NEWARK, NEW*` AIR-PUK?.

Specification of Letters Intent. i

Patented Jane'ii, i912.

j Application led October 24, 1911. SerialNo. 656,435.

Tc all whom 'it ma/y concern:

Be it known that we, FREDERICK J. SCHAEEER and EMIL BEYER, citizens of the United States, residing at Newark, in the county of Essex and State of New Jersey,

have invented certain new and 'useful Improvements in Air-Pumps; and we do hereby declare the followlng to be a full, clear, and exact description of the invention, such .as will enable others skilled in the art to which it' appertains to make. and use the same, reference .being had to the accompanying drawings, and to characters of reference marked thereon, which form a part o-f this specification. l

The invention relates, generally, to improvements in air-pumps; and, the presentrefers, more particularly, to a novel construction of pump adapted for use in connection with pressure tanks, plumbers torches, plumbers furnaces, and similar apparatus. y

The presentinvention has for its principal object to provide a simple and easily constructed air-pump, by means of which air-pressure may be generated within a suitble receptacle, and the parts of which are of such construction and arrangement, so that the discharge-end of the pump may be easily and quickly closed against the escape of the air-pressure established within and by means of the pump, when not in'use.

Another object of the presentinvention is the provision of locking the piston-rod of the pump in its inwardly thrust position, whereby not onl is the discharge-opening of the pump close but the piston rod is maintained within the pump and out of the way, when the pump is not in use. v

Other objects of the present invention, not at this time more 4particularly enumerated, will be clearly understood from thefollowing detailed description of the present invention;

With the various objects of the present -in- Vent-ion in view, the said invent-ion consists, primarily, in the novel construction -of airpump hereinafter set forth; and, furthermore, this invention consists in the several noyel arrangements and combinations of the various devices and parts, as well as in the details of the'construction thereof, all of which will be hereinafter more' fully described in v the following specication, and then finally embodied in the clauses of the means for holding and claims which are appended to and whichv `form an essential part ofthis specification.

The invention is clearly illustrated in the accompanylng-drawings, in which Figure 1 1s a vertical longitudinal sectron lof the novel construction of air-pump made according to and embodying the princlples of the present invention; Fig. 2 is a top end View of said air-pump; and Fig. 3 1s a transverse section of the same, taken lon lline 3--3 inv said Fig 1. Fig. 4 is a detail vertical longitudinal section of the upper portion of a slight-ly modified construction o f air-pumpyand Fig. 5 -is a transverse section of the same, takenon line 5-5 in said Fig. 4.

4Similar characters of reference are employed in all of the said hereinabove described views, 'to 'indicate corresponding parts.

Referring now to the said drawings, the reference-character 1 indicates a complete pump embodying the principles of the present invention, the same comprising a hollow tubular body-portion or shell 2. Arranged in the bottom end of said body-portion or -shell is the end-plug 3, the same being of the diameter of the inside dimensions of said body-portion or shell, so as to be received within the same. Said end-plug is provided `upon its circumferential sides with an annular groove 4.-, into which 'is pressed a portion of the walls of said body-portion or shell, thus forming a retaining bead 5 in holding engagement with the said end-plug. Of course, it will be understood, however, that said end-plug may be secured in its proper relation to said body- .ortion or shell 1n many other ways, such, or example, as

by means of screw-threads, solder, pins, or

retaining beads, in other arrangement than here described. Said end-plug is provided at its under side with an extension or nipple- -portion 6 which is formed with external screw-threads 7, by means of which said pump may be secured in proper relation to the apparatus with which itl is to b e used. Said end-plug is further provided with a longitudinally extending opening 8, extending through said end-plug, andits extension or nipple, and forming the discharge-oriiice of said pump. lThe-upper end of said bodyportion or shell 2 is formed with screwthread portions 9, providing external and internal screw-threads. The reference-character 10 indicates a guide-block provided with external screw-threads` 11 adapted to engage the internal screwthreadsl formed ing 12, and the upper surface of said guideblock is further provided with a nut or fingeriece v18, extending transversely thereof,

and y means of which said guide-block may be manipulated to insert it within said bodyportion or shell 2, or remove thesamefrom lts connection with said body-portion or shell. The reference-character 14 indicates a piston rod upon the inner end of which is a suitably formed piston-member 15, the same being retained in its connection with said piston rod by means of a suitablejnutpiece 16,. which screws upon the screwthreaded stud17 With-which the lower end of the piston rod is connected. Said nutpiece 16'is provided upon its lower side with a receiving socket, formed by the annular wall 1 8, sa-id receiving socket being adapted to receive and hold a valve-member 19, preferably made of some resilientmaterial and adapted to be pressed against the inner end of the discharge-orifice thereof. Said valve-member 19 is retained in its receiving socket by slightly turning in the marginal edges of said annular wall 18 of said nut-piece, so as to cause the same to Abind upon said valve-memben Said piston-rod' 14 extends uiwardly through the hole or opening 12 o said guide-block 10, and secured to the upper free end of said piston rod is a combined piston-rod handle and pump-cap 21, the same being provided with an annular flange or skirt 22 which is provided with internally arran dscrewthreads 23 adapted to be broug t into enagement with said external screw-threads ormed by the screw-thread portions 9 of said body-portion or shell 2, ,thus closing the upper end of the pump and at the same time locking said piston rod'in its inwardly thrust relatlon to said pump, whereby said valve-member 19'is brought into closing engagement with'the discharge-orifice of said ump, in the manner hereinabove described. y unscrewing the said combined piston-rod handle and pump-cap 21 from its engaged relation with said screw-thread portions 9 of said body-portion or shell 2, the same may be usedas a handle for reciprocating the piston-member and piston rod, the latter bemg guided in its reciprocating movements by said vguide-block 10. When said com bmed piston-rod handle and in this manner freed from lts e a ement with said body-portion or shell 2,.1t ollows r that upon lifting the piston-rod, said valvemember 19 is carried away from its closing engagement with said discharge-oriiice,and

upon the reciprocation of the pump pistoni aid guide-block is propump-cap 21 is said piston-memberv and preventing its aoci-' dental removal from the. body-portion or shell 2, during the reciprocations of the same. In order to prevent shocks and jars consequent uponthe strikin vof the pistonmember acglainst said guidelock 10, there is provide a small lengt-h of coiled vspril 24 which is arranged about-said piston r above the piston-member, the same a shock-absorber or buffer.

The above described construction of pump provides a very neat, compact, and cheaply constructed self-locking airump, which may be permanently secured an air-tank,

acting as or other structure, and which is proof against the leaking of air from said tank,

or other structure, when the pump is not in use. Y I' Referring nowmore particularly to Figs. 4 and 5 of the drawings, there is illustrated therein a slightly modifiedmconstruction of guide-block and manipulating mea-ns adapted to be used in'connection with an air-pump of the same general construction as that hereinabove escribed. The referencecharacter 25' indicates this guide-block' so d* which .is provided with external screwthreads 26 adapted to engage the internal ,screw-threads ormed by the screw-thread portions 9 of said body-portion orv shell 2,. so as to be arranged inthe upper end of the latter. Said guide-block is provided with a centrally" disposed hole or opening 27, through which may pass the'piston rod 14. Connected with said ide-block, andA extendin downwardly om the under side thereo are a pair of pins or studs 28. The top-washer 29 of the iston-member 15 is provided'with a pair o perforations 30 providing receiving sockets into'which the ends' of sald pins or studs 28 enter when said 'piston member is drawn upwardly to the top of the body-portion 'or'shell 2. When said pins or studs 28 are so engaged, the piston rod 14 may be rotated, and such movement is transmitted to said guideblock, so that the same may be unscrewed from orv screwed into the proper enagement with the internal screw-threads formed by said screw-thread portions 9 of the bodyportion or shell 2, whereby said guide-block 1s manipulated to remove the 'same from, or

engage the same with the top of said bodyportion or shell 2.

We are aware that changes may made ments and combinae evices and parts,and

in the various arran tions ,of the several in the features' of lour present invention without departing from the scope thereof,

' screw-thread surfaces as described in the foregoing specification, and as defined in the clauses of the claims which are appended thereto. Hence, we do not limit our invention to the exact arrangements and combinations of the various devices and parts as herein'set forth, and as illustrated' in the accompanying drawings, nor do we conne ourselves to the exact details of the construction of the said parts.

1. In a pump, the combination with 'a tubular body-portion or shell, of screwthread portions formed at the upper portion or mouth of said body-portion or shell to provide external and internal screwthreaded. surfaces, a guide-block provided with a central opening and external screwthreads engagin said internal screw-thread surfaces 4of saidody-portion or shell, a piston rod' adapted to be reciprocated through said guide-block, and a iston-rod handle provided with an internal yscrew-threaded annular flange 0r skirt adapted to be brought into engagement. with said external of said body-portion or shell, to lock said piston-rod in its downwardly thrust position within said pump.

2.v In a pump, the combination with a tubular body-portion or shell, of screwthread portions formed at the upper portion o r mouth of said body-.portion or shell to provide external and internal screw-thread bined piston rod surfaces, a bottom-plug provided with a discharge-orifice connected with the lower end of said body-portion or shell, a guide-block provided with a central openingfand eX- ternal screw4threads engaging said internal screw-thread surfaces of said body-portion or shell, a piston-rod adapted to be reciprocated through said guide-block, and a comhandle and pump-cap secured to the upper end of said piston-rod, the same being provided with an internally screw-threaded annular flange or skirt adapted to be brought into engagement with said external screw-thread surface of said body-portion or shell, to close the top of said pum and to lock said piston-rod in its downwar ly thrust position within said pump when not in use, a resilient valvemember, and means connected with the inner end of said piston-rod for carrying the same, said valve-member being adapted to' close the Vdischarge-orifice of said bottomplug when said piston rod is locked in its downwardly thrust position.

In testimony, that we claim the invention set forth above we have hereunto set our hands this 13th day of October, 1911.

FREDERICK J. SCHAEFER. EMIL BEYER.

Witnesses:

Grenen D. RICHARDS, FREDK. H.. W. FnAnN'rzEL. 

